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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10185131 B1

PDFFull Text
Date of Patent:
Jan. 22, 2019

Filed:

Jan. 28, 2016

Zoom lens and lens barrel and image pickup apparatus using the same

Applicant:

Olympus Corporation, Tokyo, JP;

Inventors:

Takashi Fujikura, Tokyo, JP;

Keisuke Takada, Tokyo, JP;

Keisuke Ichikawa, Tokyo, JP;

Assignee:

OLYMPUS CORPORATION, Tokyo, JP;

Attorney:

Hunton Andrews Kurth LLP

Primary Examiner:

Evelyn A Lester

Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 15/177 (2006.01); G02B 7/02 (2006.01); G02B 15/20 (2006.01); G02B 27/00 (2006.01); H04N 5/232 (2006.01); H04N 5/357 (2011.01); G02B 9/12 (2006.01); G02B 5/00 (2006.01); G02B 15/15 (2006.01); G02B 15/16 (2006.01); G02B 13/18 (2006.01); G02B 15/163 (2006.01); G02B 13/04 (2006.01); G02B 13/00 (2006.01);
U.S. Cl.
CPC ...
G02B 15/177 (2013.01); G02B 7/021 (2013.01); G02B 15/20 (2013.01); G02B 27/0025 (2013.01); H04N 5/23209 (2013.01); H04N 5/3572 (2013.01); G02B 5/005 (2013.01); G02B 9/12 (2013.01); G02B 13/009 (2013.01); G02B 13/04 (2013.01); G02B 13/18 (2013.01); G02B 15/14 (2013.01); G02B 15/15 (2013.01); G02B 15/16 (2013.01); G02B 15/163 (2013.01);
Abstract

A zoom lens includes in order from an object side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a negative refractive power, and at the time of zooming, movement of the first lens unit includes at least a movement toward an image side, the second lens unit moves integrally with an aperture stop, and the third lens unit moves toward the object side, and the first lens unit includes at least a negative lens and a positive lens, and the negative lens is disposed nearest to an object, and the following conditional expressions are satisfied:0.75<(β/β)/(β/β)<1.38−0.70<β<−0.320.96<<1.80.

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